Cement and concrete nozzle.



P. C. PETTITT.

\ CEMENT AND CONCRETE NOZZLE. APPLICATION FILED JUNE 25. 1913. RENEWED FEB. 9. 1915.

1,153,132.- Patented sept. 2,1915.

5 wumtoa,

feud 6.

{TED STATES PATENT OFFIC PAUL C. PETTITT, OF SCHOFIELD BARRACKS, HONO LULU COUNTY, TERRITORY OE HAWAII.

CEMENT AND CONCRETE NOZZLE.

\fipeciflcation of Letters IPatent.

Patented Sept. 7, 1915.

Application filed June 25, 1913, Serial No. 775,770. Renewed February 9, 1915. Serial No. 7,105.

To all whom it may concern:

Be it known that 1, PAUL C. PETTITT, a citizen of the United States, residing at Schofield Barracks, Oahu, in the county of Honolulu and Territory of Hawaii, have invented new and useful Improvements in Cement and Concrete Nozzles, of which the following is a specification.

The invention relates to a cement and concrete nozzle and more particularly to the class of cement or concrete mixing and distributing nozzles.

The primary object of the invention is the provision of a nozzle wherein cement or concrete supplied to the same will be properly mixed with Water and distributed thereby.

Another object of the invention is the provision of a nozzle of this character wherein different forms of tips and nipples can be used for executing different characters of Work.

A further object of the invention is the provision of a nozzle which is simple in construction, thoroughly reliableand eflicient in operation and inexpensive in manufacture. v

With these and other objects in view the invention consists in the construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in accompanying drawings and pointed out in the claims hereunto appended.

In the drawings :F igure 1, is a vertical longitudinal sectional view of a nozzle constructed in accordance with the invention. Fig. 2, is a sectional view on the line 2-2 of Fig. 1. Fig. 3, is a view similar to Fig. 1 showing a different nipple and tip connected therewith. Fig. 4 is a sectional View on line 44 of Fig. 1.

Similar reference characters indicate corresponding part throughout the several /views in the draw'ngs.

Referring to the drawings by numerals, the nozzle comprises a cylindrical shell or body 5, having externally threaded reduced ends 6, on one of which is detachably connected\a coupling sleeve 7 having inserted therein a -cement or concrete supply hose 8, the latter being detachably held or clamped therein by means of a binding collar 9 en gaging in the said hose and this collar is fastened in the sleeve in any desirable manner. Detachably engaged on the opposite redu'ced threaded end 6, is an outwardly tapered tubular protector 11, the same being formedwith an internal shoulder 12 at its attached end for the detachable securing of an internal discharge nozzle '13 therein which is of less size than the said tubular protector so that the inner wall 14 of the latter will be spaced therefrom, the discharge nozzle 13 being formed with an outturned annular flange 15 at its inner end to engage the shoulder 12 and the reduced end 6 adjacent thereto.

Removably held within the shell or body 5 is a jet nipple 16 which is of forwardly tapering formation and has at its larger end an out-turned flange 17 detachably held between the shouldered portion 18 of the sleeve 7 and the reduced end 6 adjacent thereto of the body, the passage through the jet nipple being in alinement with the bore in the internal nozzle 13 so as to direct the cement or concrete thereinto.

Surrounding the jet nipple 16 is a water space 19 the said nipple 16 at its smaller end being spaced from the inner end of the internal nozzle 13 so as to permit the water from the space 19 to enter the latter for the mixing thereof with the cement and concrete and also for forcing the same without for distribution.

It will be noted that the bore in the nipple 16 is'tapered in one direction, and likewise the bore in the discharge nozzle 13 is tapered in one direction, while the larger end of the bore in the nipple 16 is of slightlygreater size than the end of the bore of the hose 8 adjacent thereto, and the opposite smaller end of the bore in the nipple 16 is of slightly less size than the end adjacent thereto of the bore in the discharge nozzle so that when the material passes from the hose prior to its delivery into the internal nozzle 13 so that the water intersecting the path of the bores in the nipple 16 and nozzle 13 will co-mingle or mix the materials before the same are discharged from the said .nozzle 13.

Tapped into the body or shell 5 at one side thereof is a water inlet elbow 20 formed with a valve casing 21 having a partition 22 provided with a valve opening 23 and a valve seat concentric theretowith which engages a valve 24 carried by a valve stem 25 i into the nozzle 16 it will be brought together slidably mounted in the casing 21, the same i being designed to permit the release of the valve 24 which is normally held closed by means of a coiled expansion spring 26 surrounding its valve stem 25, the same being formed with a. hand grip 27 on its outer end to permit the manual manipulation thereof.

In Fig. 3 there is shown a slight modification of the invention wherein the body 28 has its externally threaded reduced ends 29, one of which carries the sleeve 30 for connecting the supply hose thereto, while the opposite end has detachably connected thereon a cap 31 having a threaded aperture 32 detachably receiving the inner end of a discharge nozzle 33, as shown. The body is formed at the end to carry the sleeve 30 with internal threads 34 with which is detachably engaged the larger end of an outwardly tapered jet nipple 35 as hereinbefore described.

The hose 8 receives its charge of cement or concrete in any desirable manner and likewise the water elbow is connected with any source of water supply. The nipple 16 and nozzles 13 and 33 are preferably made from glass, although the same may be made from any other suitable material.

The coupling sleeve 7 has fixed thereto at diametrically opposite points spring latches 35, the latch ends of which engage the binding collar 9 to retain it in the coupling sleeve for the fastening of the hose therein. When it is desired to detach the hose 8 the latches 35 are swung outwardly and on pulling upon the hose the binding collar 9 will be removed from the coupling sleeve 7 together with the hose.

The stem 25 is provided with screw threads 36 with which is engaged a thumb nut 37 on one side of which and surrounding the stem is located a coiled tension spring 38 which works against the said valve casing 21 and the grip 27, the thumb nut when turned will vary the tension of the spring for the proper working of the valve.

From the foregoing it is thought that the construction and operation of the device is clear and well understood without necessitating a further detail description and therefore the same has been omitted.

\Vhat is claimed is 1. A cement and concrete gun nozzle comprising a cylindrical shell having externally threaded ends, an outwardly tapered nipple detachably held within the shell at one end thereof, means detachably connected with one threaded end of the shell for detachably securing "a hose, the end of the bore in the nipple next to the hose being of slightly greater size than the bore in the said hose, and a discharge nozzle detachably connected with the other threaded end of the shell, the inner end of the bore of the said nozzle being of slightly greater size than the outer end of the bore of the said nipple, the outer end of the said nipple spaced rearwardly from the inner end of the discharge nozzle, and means for admitting fluid into the shell.

2. A cement and concrete gun nozzle comprising a cylindrical shell having externally threaded ends, an outwardly tapered nipple within said shell, means detachably connected with one threaded end of the shell for detachably connecting a hose and also for detachably holding the said nipple in position within the shell, a tubular protector detachably connected to the other threaded end of the shell, and an outwardly tapered discharge nozzle within said protector and coextensive therewith, and also detachably held in position by the said protector, the bore of the nozzle at its inner end being of slightly greater size than the bore in the nipple at its outer end, and fluid supply means communicating with the shell for supplying fluid thereto, the outer end of the nipple spaced rearwardly from the inner end of the said nozzle.

In testimony whereof I ailix my signature in presence of two witnesses.

PAUL C. PETTITT. 

